They are doing battle against their enemies.

The soldiers fought bravely on the battle-field.

The soldiers fought bravely on the battle-ground.

The battle waggon rolled onto the battlefield, ready for action.

The battle wagon rolled across the battlefield, crushing everything in its path.

The battle waggons rolled onto the battlefield, ready for action.

The battle wagons rolled across the battlefield, ready for war.

The battle of the brains at the science fair was intense.

I met a Battle Creeker at the conference.

The Battle Creekers gathered for a reunion.